Remove echo command (#6506)

Remove the echo command as the last command in the build step so that
CodeBuild uses the exit status of mvn as the result of the job.

Author: dagnir

buildspecs/s3-regression-tests.yml

@@ -12,7 +12,6 @@ phases:
           exit 0
         fi
         mvn clean install -P s3-regression-tests -pl :s3-tests -am -T1C -Dregression.test="$REGRESSION_TEST" $MAVEN_OPTIONS
-        echo $MAVEN_OPTIONS
     finally:
       - mkdir -p codebuild-test-reports
       - find ./ -name 'TEST-*.xml' -type f -exec cp {} codebuild-test-reports/ \;